On Wed, Apr 14, 2010 at 04:21:01PM +0200, Andrea Cometa wrote: > Greg KH ha scritto: >> On Tue, Apr 13, 2010 at 07:40:24PM +0200, Andrea Cometa wrote: >> >>> Hi, >>> First of all I apologize for my poor knowledge of English ... >>> >>> I'm having problems with a USB serial adapter Prolific PL2303. >>> My Linux distribution is Ubuntu 9.10 with kernel 2.6.31-20. >>> the adapter is recognized and the file ttyUSB0 is also created. >>> But the serial device receives and sends no reply. >>> On the Internet I found some information concerning the possibility that >>> this adapter is a pl2303x instead pl2303, as the command lsusb shows the >>> value of "bmaxpacketsize0 64". >>> Have any ideas about how to fix this problem? >>> >> >> The "x" device should work with the latest driver, can you try out a >> newer kernel version? The 2.6.31 kernel was known to have problems with >> the pl2303 and other tty drivers. >> >> thanks, >> >> greg k-h >> >> >> > hi, > > i've installed kernel 2.6.34-rc2 but there was no change > there may be an old working kernel? Hm, what kind of messages do you get from the kernel log when you plug a device in and then start sending/receiving data through it? Also, are you sure you have the flow control set up properly? That always tripps me up :) thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
